München 2019 – wissenschaftliches Programm

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K: Fachverband Kurzzeit- und angewandte Laserphysik

K 3: Laser Systems I

K 3.2: Vortrag

Dienstag, 19. März 2019, 14:20–14:40, HS 3

Dispersion management in a fs Fiber-Feedback Optical Parametric Oscillator — •Matthäus Jäckle1, Heiko Linnenbank1, Tobias Steinle2, Florian Mörz1, Andy Steinmann1, and Harald Giessen11University of Stuttgart, Pfaffenwaldring 57, 70569, Germany — 2ICFO Institute of Photonic Sciences, Av. Carl Friedrich Gauss 3, 08860 Barcelona, Spain

Fiber-Feedback optical parametric oscillators (ff-OPO) are tunable, coherent light sources which are used in a wide range of spectroscopic applications like FTIR, sSNOM and SRS. They rely on a fiber-based cavity and large nonlinear gain, which is usually achieved by pump pulses in the picosecond and several hundred femtoseconds regime. This combination leads to a remarkable temporal power stability and ultralow noise characteristics.

The investigated ff-OPO is pumped by a near-infrared solid-state laser with a pulse duration close to 100 fs. Light between 1400 nm and 1900 nm with 120 fs pulse durations and nJ pulse energies is generated. In our experiments the feedback-fiber of the cavity introduces not only pulse broadening caused by linear dispersion, but also nonlinear fiber effects such as Kelly sidebands and self-phase modulation. These effects lead to broader pulses as well as disturbances in the spectrum. Here we show how these effects can be compensated, reduced or even exploited by carefully controlling the intra-and extra-cavity dispersion.

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